Description And Operation: Operation

The Electronic Vehicle Information Center (EVIC) control switch pod is Local Interface Network (LIN) unit that receives voltage from and provides hard wired inputs to the LIN slave node circuitry of the LIN module. The LIN slave node circuitry communicates the switch states of the EVIC control switch pod, the remote radio switches, the horn switch and the heated steering wheel sensor (if equipped) over the LIN data bus to the LIN master node integral to the Steering Column Module (SCM) integral to the Steering Column Control Module (SCCM) mounting housing located on the top of the steering column below the clockspring. The SCM is also a gateway to the Controller Area Network (CAN) data bus.

The EVIC control switch pod contains five push buttons whose functions are:

• Down Arrow  - Pressing and releasing the Down Arrow push button allows the operator to scroll downward through the various EVIC main menus and sub menus.
• Left Arrow  - Pressing and releasing the Left Arrow push button returns you to the previous sub menu or main menu.
• OK  - Push the OK button to access/select the information screens or submenu screens of the Main Menu item. Push and hold the OK arrow button for one second to reset the displayed/selected features that can be reset.
• Right Arrow  - Pressing and releasing the Right Arrow (Select) push button allows the operator to navigate, select and reset items or settings in the currently displayed EVIC main menu or sub menu. Pressing and holding the Right Arrow (Select) push button for two seconds provides a global reset of all of those EVIC features that can be reset, whether currently displayed or not.
• Up Arrow  - Pressing and releasing the Up Arrow push button allows the operator to scroll upward through the various EVIC main menus and sub menus.

For vehicles equipped with the Uconnect® Hands-Free Communication System, the EVIC control switch pod contains three additional switch push buttons whose functions are:

• VR (Voice Recognition)  - This switch button activates the Uconnect® Voice Command system.
• Phone Pick-Up  - This switch push button activates the Uconnect® Hands-Free Phone system.
• Phone Hang-Up  - This switch push button disconnects the Uconnect® Hands-Free Phone system.

The LIN slave node circuitry of the LIN module or the cruise control switch pod provides current for all of the switches and sensors on the rotating steering wheel as well as for the Light Emitting Diode (LED) back lighting of both the cruise control and the EVIC control switch pods. The SCM continually monitors all of the hard wired speed control switch circuits as well as the LIN bus data. The SCM will store a Signal Not Available (SNA) code for any LIN bus input errors. The SCM also communicates with other electronic modules over the CAN data bus. Therefore, any SCM DTC information can be retrieved using a diagnostic scan tool connected to the Data Link Connector (DLC).

The analog resistor multiplexed circuits of the EVIC control switch pod as well as the hard wired circuits between the switch pod and the speed control switch pod may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the LIN slave or master nodes, the SCM or the electronic controls and communication between modules and other devices that provide some features of the EVIC system. The most reliable, efficient, and accurate means to diagnose the EVIC control switch pod, the LIN slave or master nodes, the SCM or the electronic controls and communication related to EVIC system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.